Once again, the program was grounded and scientists struggled to solve the problem.

More important, perhaps, the scientists are struggling with a sharply reduced scale of pay, both financial and psychological.

Even the scientists themselves struggle to come to terms with the limitless reality that is unfolding.

The fact that for 30 years social scientists have struggled to produce a theory of interaction tells us just how complex it is.

For decades, scientists have struggled to tame nuclear fusion, the energy that powers the sun and the stars.

But incidence has mounted by about 11 percent since 1973, and scientists have been struggling to discover why.

It was an old discovery, from the days when scientists were struggling to catch up with technology.

Yet because scientists are still struggling to understand the poison, none of those patents have led to successful products.

Yet these scientists have struggled to find anyone to back their research.

Great scientists may struggle all their lives over certain issues and never reach a resolution.